A 122-storey residential development in Dubai Marina by Trident International Holdings designed by Dr Andrew Bromberg of Aedas Architects.
At a height of 516metres, Pentominium will be one of the tallest residential towers in the world if it is ever completed.
The project was launched in 2007 and ground works began in 2009. Completion was expected to be in 2015, but in 2011 the project was put on hold by which time the building had reached level 24.
The design of the building has two different sides centred on a shared core.
The mainly southern flank consists of a series of balconies and a vertical layer of glass to cut down the solar gain. The glass becomes wider towards the top of the building and acts as a wind-break to protect the balconies from the higher-velocity winds at greater heights.
On the northerly flank apartments alternate with sky gardens creating a staggered shape.
Facilities are promised to include a sky lounge, a business centre, a cigar lounge, a sky pool and an observation deck - all above 400 metres.